SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier bftest
   Function hasAny (children 1)
    ExpressionList (children 2)
     Identifier x
     Literal Array_[Array_[UInt64_123], Int64_-42]
 Identifier Null
